Improvement in water-indicators and alarms



Steam-Boilers;

. alarm.

@mi eine.'

M IRABEAU N; LYNN, or New ALBANKNDIANA.

Letters Patent No. 107,934, dated October 4, 1870,

N l-.MPRovEMl-:Nfr IN `wareR-mnlcr'r'vrons AND ALARMs. N

The Schedule referred toin these Letters Patent and making part of thesante.

To @Hicham it may concern `ne a known that I, Mm-A'BEAU N. LYNN, of

New Albany, in --the county of Floyd and State of Indiana, have inventedcertain new and `useful Improvements for Indicating the Height ofWaterin andI do hereby declare that the following is a full, clear, andexact description thereof, reference being hadto theaccompanyingfdrawing making part of thisjspeciiication, inV which-` NFigure 1 is a front view ofa portion -of a boiler- `head having thetransparent indicator applied to it.

Figure 2 is aver-tical central section through g.Y l, show ing thetransparent indicator and the `Figures 3 and 4:` are different views ofAthe alarm# valve and the lever which operates' u'pon'it. l

Similar letters of reference indicate corresponding parts inthe'sevverall figures. j This invention is desi ned to indicate `theheight of water' in a steam-boiler byv lexposing-to view, through ati-ansparentplate, the interior of the boiler;

and also,`to indicate high and low water by means of an alarm device,wbicliwis operated by a rising N and descending Hoa-t, as will' behereinafter explained.

To enable others skilled in the `art to understand my inventionI willdescribe its construction and operation.

In the accompanying drawing-l A represents the `head ofa steam-boiler,through which a Ynumberof Nholes, d d, is `madethat is coveredexternally Vbya plate, C, of glass, or other suitable transparentsubstance, of proper thickness to aiord the necessary strength. f

This transparent plate may be marked, as indicated -at a a afgrl, toindicate the height of the water in the boiler, and it is confinedsteam-tight within a `frame,NB, by means ot' packing, c, crossbars, b,and bolts, as shown in iig. 2.

The frame B is firmly bolted to the boiler-head A It will be seen fromthelabove description that `I apply a plate of glass vto the shell of asteamVF boiler invsuch a` manner as to expose to View, eX-

` ternally, the interior of the boiler, without materially weakening thelatter or allowing the escape of steam. N N N i This plate G is oblong,and is so arrangedwith `relation to the highN and lQw-water marks thatthe engineer can at a glance see the height of the water in the boiler.

In conjunction with this window or transparent plate I employ analarm,which `will notfbeim-paired 'by accumulations of "calcareous deposits.

W is a steam-whistle applied on -the upper end'of a pipe, P, whichextends into the boiler, as shown in abn. that end of pipe P whichterminates within the boiler, is,a'valve',ND, which is applied on one.securedat its ends to the inner side of the boilerhead A, and on thisrod plays freely up and down a. y

float, F.

To this "fi'oat av long4 loop, T, is secured, which reto the pipe P. y yThe lshorter arm Z of the lever is constructed somewhat in the form ofan ellipse, andfreceives throughii-t the pipe P. N

'Whenthe water-line becomes too low, the weight of the iioat F will drawdown the long arm L of the lever, and cause the lower edge ot` theellip- `tical` short 'arm to' press the valve D away from its seat farenough to expose the apertures o through tube a, as shown in figs. 2, 3,and 4, thus allowing steam to pass to the whistle W and sound an alarm.

When the water becomes too high in the boiler during the operation `offeeding it, .the float F will rise until a stop, s, on the loop Tstrikes'the ,long arm L of the lever and causes the upper edge of the short arm lto open the valve D and sound anv ceives end of a lever, L,that is pivoted at t alarm.-

The plate'S, which is xed to one side of the valve-lever, is notched toreceive the valve D and` prevent this valve Vand its tube u becomingdetached from pipe4 P.

I thus secure additional safety by providing the boiler with an alarm,which, in the absence of the engineer, will surely. sound an alarm,should the Water become too low or too high in the boiler.

` In Iig. 2`.I have represented a valve, X, hinged inside of theboiler-head A, at its upper end, and held oi therefrom by alight spring,y, at its lower end. This valve has packing applied around its mareY 1n.g Should the glass plate G 'be broken, from any cause, the pressureinthe boiler will force the valve X'tigbtly to its seat and prevent theescape of -water and steamV thronghopeningstl d.

Having described my invention,

What I Nclaim as new, and desire tc secure by Letters Patent, is-.-

1. The glass or transparent plate C, in combina- 3. The combination ofthe valve-stop S,'with the tion with a. valve, d, which Will close theopening valve-lever L, substantially as described.- covered by saidplate in the event of the latter' be- MIRABEAU N. LYNN. coming broken,substantially as described.

2. The valve D, and its perforated tube n, ap.- Witnesses: plied to thesteam-whistle pipe P, iu combination JOHN H. STOTVSENBURG, with :ilever, L l, and a. tripping float, substantially THOMAS M. BROWN. asdescribed.

